本文分析了黟太公路中岩体失稳的基本条件,基本规律及影响因素。认为断裂构造岩体的失稳问题,实质上是工程结构体的稳定问题。其稳定性变化受多种因素的影响,它以不稳定岩体沿结构弱面向开挖区滑移与崩塌为特征,并且滑移与崩塌随时间的变化可有某种发展规律。文中划分了失稳过程中的不同发展阶段。 This paper analyzes the basic conditions, basic laws and influencing factors of rock mass instability in the Qitai Highway. It is believed that the problem of instability of fractured rock mass is essentially the stability of the engineering structure. The stability change is affected by many factors. It is characterized by slipping and collapse of unstable rock masses along the structurally weakly facing excavation area, and there may be some developmental laws of slip and collapse over time. The paper divides the different stages of development in the process of instability.